EP2360282B1 - Four à arc électrique - Google Patents

Four à arc électrique Download PDF

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Publication number
EP2360282B1
EP2360282B1 EP10006816A EP10006816A EP2360282B1 EP 2360282 B1 EP2360282 B1 EP 2360282B1 EP 10006816 A EP10006816 A EP 10006816A EP 10006816 A EP10006816 A EP 10006816A EP 2360282 B1 EP2360282 B1 EP 2360282B1
Authority
EP
European Patent Office
Prior art keywords
furnace
vessel
frame
electric arc
tapping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10006816A
Other languages
German (de)
English (en)
Other versions
EP2360282A1 (fr
Inventor
Markus Ertl
Atul Arora
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2360282A1 publication Critical patent/EP2360282A1/fr
Application granted granted Critical
Publication of EP2360282B1 publication Critical patent/EP2360282B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5294—General arrangement or layout of the electric melt shop
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
    • F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D3/123—Furnace cars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4686—Vehicles for supporting and transporting a converter vessel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/50—Tilting mechanisms for converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to an electric arc furnace, comprising a furnace lower vessel, a furnace upper vessel and a furnace lid receiving the electrodes, through which the furnace upper vessel can be closed, and a frame movable horizontally on rails, on which the furnace vessel is arranged.
  • the electric arc furnace according to the WO 031029499 be, with this furnace, the tapping channel is provided in a separately mounted bay, the bay is detachably attached to the end wall of the per se circular furnace vessel.
  • the furnace vessel For tapping the furnace vessel is tilted so that the liquid metal enters the tapping channel in the bay.
  • a pressure is built up in the bay, so that the metal initially kept away from the tapping and then - when opening the tapping - immediately flows.
  • the bottom of the oven has at its lowest point a bottom tap opening through which the oven can be completely emptied when needed.
  • the electrodes are first moved out of the oven by lifting, so that then the lid of the oven can be lifted and swung to the side.
  • the known tiltable or non-tiltable furnace constructions are costly including the associated units and consuming in handling as well as the maintenance.
  • the object of the invention is to provide an electric arc furnace, which on the one hand is not tiltable and on the other hand can be dispensed with pivoting and lifting the furnace lid, as well as a pivoting of the electrodes.
  • the main change is the renunciation of the tiltability of the furnace, for the purpose of slagging or- the tapping off of the liquid steel.
  • a Ofenkippsystems now a Ofenverfahrsystem is used without the need to raise the furnace lid or swing.
  • the currently customary, the furnace vessel system supporting tilting frame changes to a translationally horizontally movable frame, similar to a pan transport vehicle.
  • This frame is symmetrical and has two axes.
  • this frame dispenses with the heavy tilting and tilting lid movement on the costly cultivation, softer so far used to accommodate the necessary large rolling bearing ..
  • the resulting savings in material amounts to about 35-40 to Depending on the size of the furnace, this is a heavy-duty, labor-intensive welded steel construction, as well as the costly mechanical processing, eg for the bearing seat or the contour of the cradles.
  • stage construction covering this frame is now symmetrical and also becomes much smaller and completely dispenses with supporting frameworks
  • the frame is driven, for example, by two stationary, electromotive drives (similar to a crane hoist) on the same side.
  • the drives act on one cable drum each with a rolling and a rolling steel cable end depending on the direction of travel).
  • the rope ends are on both sides of the vessel frame, connected to the central axis.
  • Abschlack lighter are only ever a pulley over which possibly also the ropes can be biased.
  • the frame is either pulled in one direction or the other, without the Rope stop points are moved vertically. The lifting of the moving masses is reduced to a minimum.
  • the upper and lower vessels do not change. Only the contour of the furnace bottom, that is, the angle of rise of the floor in the tapping area, may need to be adapted to the realizable and required angle of inclination.
  • the solution according to the invention simultaneously provides the possibility of swinging out the furnace lid system, e.g. for the purpose of filling the furnace vessel, and thus equivalent to a swinging the Elektrodentragarmsystems to dispense.
  • the swing portal system including the cover frame arms, is therefore completely eliminated. These are another 35 - 40 tonne heavy duty machined steel welded construction.
  • the electrode column guide frame formerly part of the swing portal, is now cast from reinforced concrete and forms part of the furnace foundation or transformer house. Thus, eliminating the need for water cooling of the aforementioned components.
  • the swivel system or the rotary actuator eliminates replacement.
  • the furnace vessel system automatically moves away from the furnace lid when moving in the direction of the tapping position or moves automatically toward the furnace lid when moving in the direction of the working position, not only eliminating the need for a furnace lid lifter (including the lid lifting cylinder, but also placement) This in the vicinity of live parts, which always caused problems with creeping currents (induction) and so-called Arcing (Elms fire). Further savings result from the elimination of water cooling, insulation and equipotential bonding in this area.
  • the spoke frame of the furnace cover is changed only with respect to the arrangement of the spokes, but otherwise remains in principle more or less unchanged.
  • the three fixtures for the lid lifts are completely eliminated. Instead, four out of six spokes are extended outward parallel to the furnace transverse axis. These extensions are stored left and right on extensions of the guide frame foundation, as well as on separate foundations on both sides of the afterburner.
  • the accessibility to the furnace cover can be made directly via a staircase cast onto the foundation of the guide scaffold.
  • the lid lift is installed in the form of grate elements directly on the lid. This is much more comfortable than the previously used steep ladder stairs, which now also omitted. Likewise, can be dispensed with a water cooling in this area.
  • the alloy nozzle is placed on the slag door side of the exhaust manifold, so that the entire alloy system can be arranged stationary. This leads to considerable savings.
  • connection to the cooling water network is made transformer house side.
  • four simple compensators used instead of two expensive swivel joints. Long hose connections of large nominal widths, coming from the transformer house wall, are completely eliminated.
  • the tie rods which carried the electrode guide columns omitted, since they are now in an extension of the hydraulic space below the furnace platform, on firmly anchored bearing blocks. This means that the regulating cylinders no longer hang freely, but are protected and easy to maintain.
  • the load distribution into the foundation is significantly cheaper, since the furnace load is now introduced via four wheels, instead of just two cradle uprising points.
  • the hydraulic room extends to the furnace foundations. This also provides additional space for additional spaces for e.g. Air conditioners and the like.
  • the cooling water supply is significantly cheaper to buy and especially for engineering. There are fewer water-cooled components. This also results in savings in maintenance.
  • Hose lines which previously made it possible to tilt the arc furnace, omitted. Instead, the hoses, which support the translational movement of the furnace are led by energy chain and placed on the oven platform easily accessible.
  • All other media such as coal, oxygen, nitrogen, argon, etc. can also be collected by energy chain.
  • a mobile bay maintenance stage is completely eliminated. D-h. There are no complex electromotive chain drive and no moving parts in this area required.
  • the bay maintenance stage is now part of the furnace foundation (the oven platform) and spans the ladle pit like a bridge. This bridge - can be reached from two sides and can be made significantly wider than the previous maintenance platform, which brings significant advantages in tapping hole maintenance. The accesses to this maintenance bridge are made via descents from the furnace platform. Further advantages arise here with regard to the tapping change. Hole breakers (hydraulic, pneumatic or mechanical), as often requested by customers, can be easily mounted on this maintenance bridge.
  • the Elektennennachsetzvorrichturyg is now integrated in the furnace lid or placed on the lid Herztragring.
  • the latter is supplemented by a circular rail (a square) on its top.
  • the Nachsetzvoriques consists of three carriers, which are star-shaped aligned to each other- While this "star” is joined together in the origin, are located at the three outer end rollers, which move on the aforementioned rail.
  • This rotatable base frame is protected against radiation by the hot electrodes through solid refractory covers.
  • each of these arms carries a central spring-damped refractory monoblock, the same diameter as the electrodes. This arrangement is placed 60 ° out of phase with the electrodes and can be rotated about 60 ° by means of a pneumatic drive.
  • the openings in the lid heart can optionally be opened or closed.
  • these are first moved to their highest position, then the Nachsetzvorplatz is rotated by 60 ° or closed the lid heart openings. Now the electrodes are lowered in succession until they come into contact with the monoblocks, the electrodes are loosened, the electrode support arms are raised in accordance with the resetting length, the electrodes are recaptured and returned to the highest position.
  • the contact with the monoblocks can be monitored via the hydraulic system (pressure and / or flow monitoring), so that the regulating cylinders are stopped before the entire weight of the electrode support arms and the guide columns is deposited on the restorer or the springs of the monoblocks are completely compressed
  • the high-current cables no longer need to compensate for tilting and tilting movements, so they are no longer twisted (80 - 90 °) and can be made shorter than before. This means a substantial extension of the life of the cables.
  • the cables are therefore cheaper in principle.
  • the reactance can be reduced due to shorter cable lengths - this means greater energy input into the furnace, less network perturbations and longer arcing
  • vascular system including movable frame, independently supplied with media such as z.13- cooling water. While one system is being melted, the other system can stall, its tapping waited, and its first scrap basket fill set.
  • Both vascular systems or their movable support frame could have a bridge-like extension in the area of the slag door, which, for example, carries a temperature and sampling lance and simplifies maintenance work.
  • CONARC hoods oxygen injection
  • one CONARC system can therefore be dispensed with four roller slewing rings (2x furnace lid, 1x oxygen lance and 1 x electrode support arms).
  • the furnace vessel is designated in its entirety. This consists of a Ofengefäßunterteil, a Ofengefäßobertell and the furnace cover. 2
  • the transformer house is referred to the hydraulic chamber.
  • the core idea of the invention is the arrangement of the oven top and bottom vessel on a frame 3 and its horizontal mobility on a rail 6.
  • the contour of the rail 6 is chosen so that the central axis of the frame 3, which can also be referred to as a central tilt axis, between the wheel axles always moves at a level (no vertical paths). That is, at the start of the process of the furnace from the working position, the abschlack capablee axis lowers while the Abstich workede axis increases.
  • the furnace top vessel removes (lowers) automatically from the furnace lid, which is why it can be dispensed with a Deckelhubwerk. This process brings the furnace to an inclination of -5 ° (on the drawing, to the left), in which excess slag runs out. In this inclination, the oven is moved further horizontally until the upper vessel is no longer covered by the furnace lid.
  • the furnace is first brought back into the horizontal.
  • the second scrap basket can be set.
  • the vessel descends to + 5 ° (inclines to the right).
  • the tapping is opened and the molten steel can in the pan on the ladle 10th flow.
  • the tapping is stopped by quickly moving the oven back to the -5 ° position.
  • the sump is prevented from flowing out (residual quantity of liquid steel), moreover, here is the stationary bay maintenance stage 9 directly below the tapping.
  • the tapping is closed again and placed at the same place the first scrap basket.
  • the oven is then brought further in the direction of working position, so that the upper vessel, coming from below, nestles against the furnace lid 2.
  • the scrap basket is denoted by 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (7)

  1. Four à arc électrique, comprenant une cuve inférieure de four, une cuve supérieure de four et un couvercle de four (2) dans lequel viennent se loger les électrodes et par lequel la cuve supérieure de four peut être fermée, ainsi qu'un cadre (3) mobile en direction horizontale sur des rails (6), sur lequel est disposée la cuve de four (1), caractérisé en ce que le couvercle de four (2) avec les composants correspondants du système et le système de bras de support d'électrode (5) sont montés à demeure, en ce que la cuve totale du four (1) constituée par la cuve inférieure de four et la cuve supérieure de four est disposée sur le cadre (3) et peut se déplacer avec ce dernier à partir de la position dans laquelle elle est située en dessous du couvercle de four (2), la voie ferrée (6) pour le cadre (3) étant réalisée de telle sorte que le four, lors de son déplacement le long de la voie ferrée (6), met en oeuvre des inclinaisons qui l'amènent d'abord dans une inclinaison tournée vers le côté décrassage et lors de son déplacement ultérieur en passant par une position horizontale, dans une inclinaison tournée vers le côté coulée, l'axe d'inclinaison central ou l'axe médian du cadre (3) ne se déplaçant qu'à l'horizontale au cours du mouvement relatif par rapport au couvercle de four (2).
  2. Four à arc électrique selon la revendication 1, caractérisé en ce que le cadre (3) présente, au moins à ses deux extrémités longitudinales, un essieu comportant des roues dont la distance axiale est adaptée à la voie ferrée (6) de telle sorte que les deux axes respectivement les deux paires de roues se trouvent, dans une position horizontale du cadre (3), partant de la cuve de four (1), dans des zones d'inclinaison correspondantes de la voie ferrée (6).
  3. Four à arc électrique selon l'une quelconque des revendications précédentes, caractérisé en ce que la voie ferrée (6) prend une configuration sinusoïdale, comprenant des zones en forme de raies s'étendant en direction horizontale.
  4. Four à arc électrique selon l'une quelconque des revendications précédentes, caractérisé en ce que la voie ferrée (6) prend la forme d'une cuvette dans la zone dans laquelle la cuve de four (1) se trouve en dessous du couvercle de four (2).
  5. Four à arc électrique selon l'une quelconque des revendications précédentes, caractérisé en ce que le cadre (3) peut se déplacer à l'aide d'une transmission par câble.
  6. Four à arc électrique selon la revendication 5, caractérisé en ce qu'on prévoit, côté coulée, un entraînement par moteur électrique comportant deux tambours à câble pour un brin de déroulement et un brin d'enroulement, les extrémités de câbles étant fixées sur le cadre (3) des deux côtés de l'axe médian et une poulie de renvoi étant prévue côté décrassage pour le renvoi du brin côté décrassage.
  7. Four à arc électrique selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans la position de coulée du four, un wagon-poche (10) comportant une poche peut venir se placer en dessous de la voie ferrée (6).
EP10006816A 2010-02-15 2010-07-01 Four à arc électrique Not-in-force EP2360282B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN386CH2010 2010-02-15

Publications (2)

Publication Number Publication Date
EP2360282A1 EP2360282A1 (fr) 2011-08-24
EP2360282B1 true EP2360282B1 (fr) 2012-12-12

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Family Applications (1)

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EP10006816A Not-in-force EP2360282B1 (fr) 2010-02-15 2010-07-01 Four à arc électrique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU229563U1 (ru) * 2024-04-22 2024-10-11 Акционерное общество "Металлургический завод "Электросталь" Напольная тележка для горизонтального перемещения кристаллизаторов печей электрошлакового переплава

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109852747A (zh) * 2018-12-11 2019-06-07 株洲天桥起重机股份有限公司 一种门式自动洒水车及控制方法
CN116814897B (zh) * 2023-07-11 2023-12-15 娄底市佳华机械有限公司 炼钢炉炉口挂渣清理用挡渣棒投放一体小车及其使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3165093D1 (en) 1980-10-09 1984-08-30 Bbc Brown Boveri & Cie Tiltable electric-arc furnace
DE3308486C2 (de) * 1983-03-10 1985-04-04 Mannesmann AG, 4000 Düsseldorf Auf kippbarem Rahmen verfahrbarer Lichtbogenofen
UA19770A (uk) * 1989-03-02 1997-12-25 Фукс Технологі Аг Електродугова плавильhа піч
DE19919378A1 (de) 1999-04-01 2000-10-05 Arcmet Technologie Gmbh Linz Metallurgisches Gefäß mit einer Abstichvorrichtung und Verfahren zum kontrollierten, schlackenfreien Abziehen von flüssigem Metall aus diesem Gefäß
TW574495B (en) 2001-09-26 2004-02-01 Sms Demag Ag Arc furnace and method for operating the arc furnace
WO2004036131A1 (fr) * 2002-10-15 2004-04-29 Sms Demag Ag Four electrique pour la production d'acier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU229563U1 (ru) * 2024-04-22 2024-10-11 Акционерное общество "Металлургический завод "Электросталь" Напольная тележка для горизонтального перемещения кристаллизаторов печей электрошлакового переплава

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EP2360282A1 (fr) 2011-08-24

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